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This is what I use on my bars;

https://www.fasttech.com/products/1603/10003978/1285802-fandyfire-x2-cree-xm-l-u2-4-mode-2000-lumen-led-bi

This is what I use on my helmet;
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Yep night lighting is cheap and STRONG! I love mine. Small, bright, cheap, and all three have lasted for more than three years. You can get the light heads for cheap but a good, high quality battery...

That's ridiculous. No way would I ever deal with that. I'm a big fan of earning your downhill and that would be really frustrating. Occasionally on a weekend there may be hikers on some of the trails...